Added 921600 and two other useful win baud rates

thirdParty/qserialport/src/win32/commdcbhelper.cpp

@@ -316,9 +316,18 @@ void CommDCBHelper::setBaudRate(QPortSettings::BaudRate baudRate)
     case QPortSettings::BAUDR_128000:
       baud = CBR_128000;
       break;
+    case QPortSettings::BAUDR_230400:
+      baud = 230400;
+      break;
     case QPortSettings::BAUDR_256000:
       baud = CBR_256000;
       break;
+    case QPortSettings::BAUDR_460800:
+      baud = 460800;
+      break;
+    case QPortSettings::BAUDR_921600:
+      baud = 921600;
+      break;
     default:
       qWarning() << "CommDCBHelper::setBaudRate(" << baudRate << "): " \
                     "Unsupported baud rate";
@@ -381,8 +390,15 @@ QPortSettings::BaudRate CommDCBHelper::baudRate() const
       return QPortSettings::BAUDR_115200;
   case CBR_128000:
       return QPortSettings::BAUDR_128000;
+  case 230400:
+      return QPortSettings::BAUDR_230400;
   case CBR_256000:
       return QPortSettings::BAUDR_256000;
+  case 460800:
+      return QPortSettings::BAUDR_460800;
+  case 921600:
+      return QPortSettings::BAUDR_921600;
+      break;
   default:
       qWarning() << "CommDCBHelper::baudRate(): Unknown baud rate";
   }